Search found 60 matches

by manseekingknowledge
Fri Oct 04, 2019 7:02 am
Forum: ESP8266 boards
Topic: Creating larger ROMs
Replies: 21
Views: 919

Re: Creating larger ROMs

Below are some updates that can be made to makeimg.py to allow automatic creation of a file system with files baked into firmware-combined.bin. Just create a directory named micropython/ports/esp8266/fs_files and put the files you want on your ESP8266 into that directory. If the the fs_files direct...
by manseekingknowledge
Wed Sep 25, 2019 2:00 pm
Forum: ESP8266 boards
Topic: How to measure time accurately?
Replies: 5
Views: 200

Re: How to measure time accurately?

and time.ticks_us() is only slightly better (fell 10 seconds behind in a 10 minute test). Then you made a mistake or your device is broken. time.ticks_us() is very accurate. (about 2 seconds per 24 hours or less). Are you aware that ticks_us() uses a 30-bits counter that overflows after about 17 mi...
by manseekingknowledge
Tue Sep 24, 2019 11:23 pm
Forum: ESP8266 boards
Topic: Readproof Code
Replies: 5
Views: 302

Re: Readproof Code

As a simple measure you can use frozen bytecode, which embeds compiled code into flash. Then there is no python code in the file system except maybe main.py or boot.py. But even the code there can be compiled into flash, or put into _boot.py, which anyhow resides in the flash memory. Still, people ...
by manseekingknowledge
Tue Sep 24, 2019 11:17 pm
Forum: ESP8266 boards
Topic: How to measure time accurately?
Replies: 5
Views: 200

How to measure time accurately?

There is a GitHub issue related to the inability of the ESP8266 to keep accurate time: https://github.com/micropython/micropython/issues/2724 The issue has been open for nearly 3 years and has an associated pull request, but it appears there is some debate about the integrity of the change. My testi...
by manseekingknowledge
Tue Sep 24, 2019 8:35 pm
Forum: ESP8266 boards
Topic: Building firmware without SSL
Replies: 8
Views: 343

Re: Building firmware without SSL

Using this post by @jimmo as guidance I did a bit of experimentation to see which flags could be disabled to reclaim some heap. This isn't an exhaustive list, but these were the only things I was able to disable to keep my program running as desired. Note the large bbs savings when MICROPY_PY_WEBREP...
by manseekingknowledge
Tue Sep 24, 2019 7:12 pm
Forum: ESP8266 boards
Topic: Global Variables
Replies: 3
Views: 975

Re: Global Variables

Depending on your variable you can do as @stijn suggested in this post.
by manseekingknowledge
Tue Sep 24, 2019 5:33 pm
Forum: ESP8266 boards
Topic: Is there an easy way to expose the value of a #define from mpconfigport.h to Python code?
Replies: 9
Views: 223

Re: Is there an easy way to expose the value of a #define from mpconfigport.h to Python code?

Since you modify main.c anyway, you could store the value as an integer in globals() so no need for a module? Can you expand on this a bit? I did some searching for "globals" and I do see some functions of interest like mp_load_global() and mp_globals_set(). Unfortunately the term "globals" is used...
by manseekingknowledge
Tue Sep 24, 2019 1:21 pm
Forum: ESP8266 boards
Topic: Is there an easy way to expose the value of a #define from mpconfigport.h to Python code?
Replies: 9
Views: 223

Re: Is there an easy way to expose the value of a #define from mpconfigport.h to Python code?

I change MICROPY_PY_OS_DUPTERM from its default value of 2 to 1 to regain 8 bbs and also only run this bit of code in main.c if the value is 2: #if MICROPY_PY_OS_DUPTERM == 2 dupterm_task_init(); // Activate UART(0) on dupterm slot 1 for the REPL { mp_obj_t args[2]; args[0] = MP_OBJ_NEW_SMALL_INT(0)...
by manseekingknowledge
Tue Sep 24, 2019 2:13 am
Forum: ESP8266 boards
Topic: Is there an easy way to expose the value of a #define from mpconfigport.h to Python code?
Replies: 9
Views: 223

Is there an easy way to expose the value of a #define from mpconfigport.h to Python code?

There is #define in mpconfigport.h I want to know the value of in my Python code. I know I can make a new C module to get access I want, but I was hoping there was some easier way.